Teaching model for evaluating internal arteriovenous fistula

Abstract

The embodiment of the utility model discloses an internal arteriovenous fistula evaluation teaching model, which comprises a half arm part, one side of the half arm part is connected with a middle arm part through magnetic attraction, one side of the middle arm part is connected with an outer side arm part through magnetic attraction, the middle arm part is made of transparent silica gel, and the outer side arm part is made of transparent silica gel. A pipeline for simulating arteriovenous veins and arteriovenous internal fistula of a human body is arranged in the middle arm part, and the outwards extending end parts of the pipeline are respectively connected with a lower hose and an upper hose. By means of the half arm part, the middle arm part and the outer side arm part, the dissecting structure of the arm can be simulated, and the section and the internal fistula structure of the operation structure can be directly opened and observed; efficient learning is facilitated; ink (red ink) can be guided into the pipeline in the middle arm part through the ink bottle, then injection practice can be carried out outside the middle arm part, blood outflow can be simulated after puncture succeeds, and the device is very suitable for practice and study.

Description

Technical Field

[0001] The utility model relates to the technical field of arteriovenous fistula teaching, in particular to an arteriovenous fistula evaluation teaching model. Background Art

[0002] Arteriovenous fistulas are a key vascular access for maintaining hemodialysis. By anastomosing a peripheral vein to an artery, venous blood flow is increased and the vessel wall thickened, leading to peripheral venous arterialization. The most commonly used anastomosis is between the radial artery in the forearm and the cephalic vein.

[0003] Arteriovenous fistula surgery requires a long time to learn, but there is no specific model during learning. Learning and understanding of arteriovenous fistula is not intuitive enough, and injection practice is not possible, resulting in low learning efficiency. Therefore, we propose an arteriovenous fistula assessment teaching model. Utility Model Content

[0004] In view of this, the present invention provides an arteriovenous fistula evaluation teaching model, which is used to solve the problem of low learning efficiency of arteriovenous fistula surgery in the prior art.

[0005] A teaching model for evaluating an arteriovenous fistula comprises a half arm, one side of the half arm being connected to a middle arm by magnetic attraction, one side of the middle arm being connected to an outer arm by magnetic attraction, the middle arm being made of transparent silicone, and a pipeline simulating human arteriovenous veins and an arteriovenous fistula being arranged in the middle arm, and the ends of the pipeline extending outward are respectively connected to a lower hose and an upper hose, one end of the lower hose being fixedly connected to a lower portion of one side of an ink bottle, and one end of the upper hose being fixedly connected to an upper portion of one side of the ink bottle.

[0006] Preferably, one side of the half arm portion, both sides of the middle arm portion and one side of the outer arm portion are bonded with magnetic rubber strips, and the magnetic properties of the opposite surfaces of the two magnetic rubber strips close to each other are different.

[0007] Preferably, one end of the half-arm is fixedly connected to the wrist, one end of the wrist is fixedly connected to the hand, and the surface of the wrist is made of silicone.

[0008] Preferably, a pulse simulation hose is built into the lower part of the wrist epidermis, an elastic balloon is fixedly connected to the inside of the wrist, the upper part of the elastic balloon is connected to the pulse simulation hose through a connecting tube, and a beating device capable of beating the elastic balloon is provided inside the hand.

[0009] Preferably, the above-mentioned beating device includes a sleeve fixedly connected to the inside of the hand, a beating rod is slidably installed inside the sleeve, one end of the beating rod is fixedly connected to a beating block, the other end of the beating rod is fixedly connected to a limiting ring, a spring is provided on the beating rod between the limiting ring and the sleeve, a cam driven by a variable speed motor is installed inside the hand, a guide groove is provided on the circumference of the cam, and one end of the beating rod is slidably provided in the guide groove.

[0010] Preferably, a power cord capable of supplying power to the variable speed motor is connected to one finger of the hand, a motor controller for controlling the variable speed motor is fixedly mounted on the outside of the hand, and a knob for adjusting the speed of the variable speed motor is provided on the motor controller.

[0011] Preferably, the above also includes an adjusting device, which includes a piston chamber arranged inside one of the fingers of the hand, a piston block is sealed and slidably installed inside the piston chamber, a threaded adjusting rod is threadedly installed at one end of the piston chamber, and one end of the threaded adjusting rod is rotatably connected to one end of the piston block; one end of the piston chamber is connected to the interior of the elastic balloon through a connecting tube.

[0012] Preferably, a supply port is provided at the upper end of the ink bottle.

[0013] The implementation of the present invention will have the following beneficial effects:

[0014] The above-mentioned teaching model for arteriovenous fistula assessment was used;

[0015] The half arm, middle arm, and outer arm sections can simulate the dissection of the arm, allowing for direct observation of the cross-section and the internal fistula structure for surgical procedures, facilitating efficient learning.

[0016] The ink (red ink) can be introduced into the tube in the middle arm through the ink bottle, and then the injection practice can be performed from the outside of the middle arm. After the puncture is successful, the blood flow can be simulated, which is very suitable for practice and learning.

[0017] The pulse simulation hose, elastic balloon and beating device on the hand can simulate pulse impact, and the amount of liquid in the elastic balloon can be adjusted through the adjustment device, so as to simulate normal or abnormal pulses and vibrations in arteriovenous fistula surgery and facilitate learning. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] in:

[0020] Figure 1 A schematic diagram of the structure of an arteriovenous fistula assessment teaching model in one embodiment;

[0021] Figure 2 A schematic diagram of the split structure of an arteriovenous fistula assessment teaching model in one embodiment;

[0022] Figure 3 is a schematic structural diagram of a beating device in one embodiment;

[0023] Figure 4 is a schematic structural diagram of an adjusting device in one embodiment;

[0024] Figure 5 It is a structural diagram of an arteriovenous fistula in the prior art.

[0025] Figure numerals: 100, half arm; 101, middle arm; 102, outer arm; 103, magnetic rubber strip; 104, transparent part; 105, pipeline; 200, wrist; 201, pulse simulation hose; 202, connecting tube; 203, elastic balloon; 204, beating block; 205, sleeve; 206, spring; 207, limiting ring; 208, beating rod; 209, cam; 210, guide groove; 211, variable speed motor; 212, connecting pipe; 300, hand; 400, motor controller; 500, adjustment device; 501, piston chamber; 502, piston block; 503, threaded adjustment rod; 600, power cord; 700, ink bottle; 701, lower hose; 702, upper hose; 703, supply port. DETAILED DESCRIPTION

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0027] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] Example 1

[0030] See also Figure 1-5 A teaching model for evaluating arteriovenous fistula includes a half arm 100, one side of the half arm 100 is connected to the middle arm 101 by magnetic attraction, and one side of the middle arm 101 is connected to the outer arm 102 by magnetic attraction. The middle arm 101 is made of transparent silicone (such as Figure 2 The transparent portion 104 shown in the figure is also included. A conduit 105 simulating human arteriovenous vessels and arteriovenous fistulas is located within the middle arm portion 101. The outwardly extending ends of the conduit 105 are connected to a lower hose 701 and an upper hose 702, respectively. One end of the lower hose 701 is fixedly connected to the lower portion of an ink bottle 700, while one end of the upper hose 702 is fixedly connected to the upper portion of the ink bottle 700. A supply port 703 is provided at the upper end of the ink bottle 700. Ink can be replenished through the supply port 703. During use, raising the ink bottle 700 allows ink to be introduced into the conduit 105. Lowering the ink bottle 700 allows gravity to drain the ink from the conduit 105. In practice, one end of the half-arm portion 100 is fixedly connected to the wrist portion 200, which in turn is fixedly connected to the hand 300. The surface of the wrist portion 200 is made of silicone.

[0031] When implementing, Figure 3 As shown in FIG, magnetic rubber strips 103 are bonded to one side of the half arm 100, both sides of the middle arm 101, and one side of the outer arm 102. The magnetic properties of the opposing surfaces of two adjacent magnetic rubber strips 103 are different. The half arm 100, the middle arm 101, and the outer arm 102 can be folded together.

[0032] Example 2

[0033] Different from Example 1, Figure 3As shown in the figure, a pulse simulation hose 201 is built into the lower part of the skin of the wrist 200, an elastic balloon 203 is fixedly connected to the inside of the wrist 200, the upper part of the elastic balloon 203 is connected to the pulse simulation hose 201 through a connecting tube 202, and a slapping device capable of slapping the elastic balloon 203 is provided inside the hand 300.

[0034] Specifically, the beating device includes a sleeve 205 fixedly connected to the inside of the hand 300, and a beating rod 208 is slidably installed inside the sleeve 205. One end of the beating rod 208 is fixedly connected to the beating block 204, and the other end of the beating rod 208 is fixedly connected to the limiting ring 207. A spring 206 is provided on the beating rod 208 between the limiting ring 207 and the sleeve 205. A cam 209 driven by a variable speed motor 211 is installed inside the hand 300, and a guide groove 210 is provided on the peripheral side of the cam 209. One end of the beating rod 208 is slidably set in the guide groove 210.

[0035] During implementation, a power cord 600 that can supply power to the variable speed motor 211 is connected to a finger of the hand 300, and a motor controller 400 for controlling the variable speed motor 211 is fixedly installed on the outside of the hand 300. The motor controller 400 is provided with a knob for adjusting the speed of the variable speed motor 211.

[0036] During implementation, the beating device can beat the elastic balloon 203, so that the liquid in the elastic balloon 203 impacts the pulse simulation hose 201 under the action of pressure, simulating the pulse; and the impact frequency of the pulse can be adjusted by adjusting the speed of the variable speed motor 211.

[0037] Example 3

[0038] Different from Example 2, Figure 2 and Figure 5 As shown in , the device further includes an adjustment device 500, which includes a piston chamber 501 disposed within one of the fingers of the hand 300. A piston block 502 is sealingly and slidably mounted within the piston chamber 501. A threaded adjustment rod 503 is threadedly mounted on one end of the piston chamber 501, and one end of the threaded adjustment rod 503 is rotatably connected to one end of the piston block 502. One end of the piston chamber 501 is connected to the interior of the elastic balloon 203 via a connecting tube 212. Liquid can be squeezed into or out of the elastic balloon 203 through the adjustment device 500, thereby adjusting the amount of liquid in the elastic balloon 203. When the tapping device is tapping, different impact forces can be generated to simulate pulses of different impact forces.

[0039] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. An arteriovenous fistula assessment teaching model, characterized in that: include: A half arm portion (100), one side of the half arm portion (100) is connected to the middle arm portion (101) by magnetic attraction, one side of the middle arm portion (101) is connected to the outer arm portion (102) by magnetic attraction, the middle arm portion (101) is made of transparent silicone, and a pipeline (105) simulating human arteriovenous veins and arteriovenous fistula is provided in the middle arm portion (101), and the ends of the pipeline (105) extending outward are respectively connected to a lower hose (701) and an upper hose (702), one end of the lower hose (701) is fixedly connected to the lower part of one side of the ink bottle (700), and one end of the upper hose (702) is fixedly connected to the upper part of one side of the ink bottle (700).

2. The arteriovenous fistula assessment teaching model according to claim 1, characterized in that: One side of the half arm portion (100), both sides of the middle arm portion (101) and one side of the outer arm portion (102) are all bonded with magnetic rubber strips (103), and the magnetic properties of the opposite surfaces of two magnetic rubber strips (103) close to each other are different.

3. The arteriovenous fistula assessment teaching model according to claim 1, characterized in that: One end of the half-arm part (100) is fixedly connected to the wrist part (200), one end of the wrist part (200) is fixedly connected to the hand (300), and the surface of the wrist part (200) is made of silicone.

4. The arteriovenous fistula assessment teaching model according to claim 3, characterized in that: A pulse simulation hose (201) is built into the lower part of the skin of the wrist (200), an elastic balloon (203) is fixedly connected to the interior of the wrist (200), the upper part of the elastic balloon (203) is connected to the pulse simulation hose (201) through a connecting tube (202), and a beating device capable of beating the elastic balloon (203) is provided inside the hand (300).

5. The arteriovenous fistula assessment teaching model according to claim 4, characterized in that: The beating device comprises a sleeve (205) fixedly connected to the inside of the hand (300), a beating rod (208) is slidably installed inside the sleeve (205), one end of the beating rod (208) is fixedly connected to the beating block (204), the other end of the beating rod (208) is fixedly connected to the limiting ring (207), a spring (206) is sleeved on the beating rod (208) between the limiting ring (207) and the sleeve (205), a cam (209) driven by a variable speed motor (211) is installed inside the hand (300), a guide groove (210) is provided on the circumference of the cam (209), and one end of the beating rod (208) is slidably arranged in the guide groove (210).

6. The arteriovenous fistula assessment teaching model according to claim 5, characterized in that: A power cord (600) capable of supplying power to the variable speed motor (211) is connected to a finger of the hand (300), a motor controller (400) for controlling the variable speed motor (211) is fixedly mounted on the outside of the hand (300), and a knob for adjusting the speed of the variable speed motor (211) is provided on the motor controller (400).

7. The arteriovenous fistula assessment teaching model according to claim 6, characterized in that: The invention also includes an adjusting device (500), wherein the adjusting device (500) includes a piston chamber (501) arranged inside one of the fingers of the hand (300), a piston block (502) is sealed and slidably installed inside the piston chamber (501), a threaded adjusting rod (503) is threadedly installed on one end of the piston chamber (501), and one end of the threaded adjusting rod (503) is rotatably connected to one end of the piston block (502); one end of the piston chamber (501) is connected to the interior of the elastic balloon (203) through a connecting tube (212).

8. The arteriovenous fistula assessment teaching model according to claim 1, characterized in that: The upper end of the ink bottle (700) is provided with a supply port (703).

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